Final answer:
The spread of Christianity throughout the Holy Roman Empire was most contributed by factors such as the power of conversion, flexibility and pragmatism of missionaries, and integration with rulers.
Step-by-step explanation:
The spread of Christianity throughout the Holy Roman Empire was most contributed by several factors:
- Power of conversion: Christianity displayed a remarkable power to convert even peoples who had previously proved militarily stronger than Christian opponents. Conversion often took place due to the persistence of Christian missionaries and the desire for better political relationships.
- Flexibility and pragmatism: Missionaries had official instructions not to battle pagan religious practices but rather reshape them. It was more important that pagans accepted the essential truth of Christianity than understanding its nuances.
- Integration with rulers: Christianity helped legitimize new rulers, as Germanic kings could integrate better with their Roman population once they converted to Catholic Christianity practiced by their subjects.